So when I no longer need one, I can just fold it up and put away until its needed again! It is like sleeping on a cloud and I wake up with no headache or neck pain at all. And i only uses one AA battery. I am the sort that needs a permanent hook in the wall not one that falls off. The fit is a little snug, I have not flown a cross country yet but after my hour and a half lessons they are still comfortable (I think they should break into my head shape after a while). 5 and they fit great! As usual they are a generous size so they are a little bit too big for my feet as they are slim but a gel heel grip works wonders. By they, I mean the right ear bud. The bottom of the pearls though fell off, and the separator has some rhinestones glued on upside down! If you want a decent pair of wireless, on ear headphones for under £50, i think these are a good choice.